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How Long Does a Semi Truck Last?

How Long Does a Semi Truck Last?

The semi-trucks with attached trailers last up to 755000 miles with adequate service and maintenance. In addition, the variants with diesel engines and high-quality transmission can survive longer than other models. 

How Long Does a Semi Truck Last? A semi-truck can last for around 755000 to 765000 miles, can cover 46000 to 47000 miles per year, and requires service after 31000 to 32000 miles. Kenworth can last for 21000 to 151000 miles, the Western star works for 12 to 16 years, Freightliner remains intact for 1.6 million miles, and Volvo can last for 1100000 miles. They can last longer due to versatile diesel engines, high-quality battery with thermostat, steel-aluminum frame, better shocks, durable clutches, and long-lasting brake system.

Excessive usage, inappropriate driving, and lack of lubrication affect their durability. Freightliner and Volvo are famous variants with maximum hauling range.

What is a semi-truck?

This truck has a trailer to carry freight and hazardous material. It is an 18-wheeler with a high-quality engine and a long lifespan.

The attachment of the trailer with a tractor unit makes it a semi-truck. However, the trailer attaches to the front tractor with a coupling hitch. 

The word semi indicates the presence of an engine in the first half of the vehicle. They have a raised, mid and flat roof according to the design and manufacturing specifications.

Day cabs are primary semi-trucks that provide daytime traveling and offer sleeping space and comfort to travelers. They have a separate cargo area, a rear cargo, and accommodation space for about 452 people.

What is the average lifespan of a semi-truck?

It has an average lifespan of around 755000 to 765000 miles. A few variants complete a lifespan of about 1 million with appropriate maintenance and services.

On average, it can cover around 46000 to 47000 miles in a year with minor repair and control facilities. They are durable due to their appealing design, advanced internal features, and attractive roof style.

They can last for about 14 to 16 years and depends on the type of maintenance, cleanliness, and usage. 

According to surveys, they have a life expectancy of about 51000 to 67000 miles per year. They can last up to 210000 miles with appropriate service and maintenance of the transmission,

Check its transmission fluid every 1 to 3 days and service the automobile after every 31000 to 32000 miles. 

Replace the broken filters, stabilize the fuel pump and check synthetic lubricants. Use it moderately and check the Cooling system once a week. 

What are different types of semi-trucks with their average lifespan?

I have explained the shelf life of a few famous semi-trucks across the USA. Their durability increases with less use, the reduced wearing of components, and the replacement of broken parts. 


These are custom-engineered units and have been a part of the automobile industry since 1923. It has advanced vocational features and can carry heavy loads.

They can last for about 21000 to 151000 miles. Its engine can last up to 751000 miles with weekly maintenance and services. 


It can last up to a million miles with care and rebuilt techniques. They have an average lifespan of around 752000 to 1100000 miles with appropriate care.

Its clutches, engines, shock absorbers, and other components require replacement after 151000 to 152000 miles. 


The LoneStar has an average lifespan of about 18 to 21 years. It is one of the largest 18-wheelers that can transport heavy loads.

LoneStar requires appropriate control and maintenance over the years. Lack of services reduces its standard shelf lift to 11 to 14 years. 

Western Star

It has been a part of Freightliner since 2000 and works as a hand-crafted and durable commercial vehicle. It has an average life of about 12 to 16 years with care techniques.

Like other variants, it can cover 751000 miles with a stable clutch, wheels, engine, and gearbox. 


Freightliner offers around eight diesel engine trucks with different chassis and cabin features. They are famous among similar variants due to their high-quality engines and durable performance.

They can last for about 510000 to 520000 miles. They can cover a distance of 1.6 million miles with monthly maintenance.

According to a few reports, the Freightliners can drive up to 5 million miles and cover around 51000 miles in 10 to 12 months. 


Volvo has launched its VNX variant to transport heavy objects and carry out other operations.

The built-in engine provides sufficient power to tow the heavy loads without a breaking point. They can cover around 1100000 miles and survive for about 19 to 21 years. 

Why do the semi-trucks last so long?

They are durable vehicles with appealing layouts and spacious accommodation spaces. I have mentioned the reasons for their longer lifespan below.

Versatile engine design

More than 72% to 75% of semi-trucks have diesel engines. They are lightweight and more efficient than other equipment.

Their engines are different from other average vehicles due to internal modifications.

It is 5 to 6 times bigger than a car’s engine. These facilitate better performance with about 1400 RPM to 1700 RPM. 

These are heavy-weight haulers and can last for about 752000 to 1100000 miles.

They undergo massive wearing and tear due to excessive usage. The diesel engines can cover around 47000 miles in a year. 

The 18-wheeler has a more massive engine than gasoline equipment.

They have several thermostats to regulate and control high-temperature conditions. The versatile design protects from mishaps and sudden accidents and decreases the loss of cargo material. 

Durable transmission

It has a durable automatic transmission that can last for about 210000 miles. The tires can cover around 27000 to 76000 miles on all types of roads. 

It varies according to the load on the cargo area. Check the system once a week and protect the components. 

High-quality brake system and clutches 

They have a high-quality brake system that prevents sudden bumping into road obstacles.

In addition, the system protects the engine frame from external damage and saves transportation material.

The replacement depends on their usage, condition, and internal wearing. They have an average life expectancy of about 251000 to 310000 miles.

The system is reliable, provides better results at closed destinations, and stops the vehicle on time. They can cover a distance of 51000 to 52000 miles.

The brake fade sensors indicate their replacements before a major accident. The clutches can survive according to the lifespan of these variants. 

The tractor-trailers have high-quality clutches with a lifespan of 21000 to 152000 miles.

They provide ample notification during internal damages and wear. A skilled driver can increase their durability by appropriate handling and control.

Overheated clutches require immediate replacement because they affect the transmission. 

Battery with temperature control

It is an advanced power system that supplies constant electric energy to all the cabin and cargo areas. It has a life limit of about 4 to 6 years with proper usage and maintenance.

It can evaporate the hot water and drains the cold liquids out of the system. 

Appropriate service, care, and repairing control the internal heat and stabilize the power system. Troubleshoot it with a digital analyzer after 2 to 3 months. 

Better shock absorbers

The shocks absorb the sudden bumps and effects of heavy loads. On average, they can survive for around 110000 miles and require troubleshooting after 13000 miles to 14000 miles.

Check and maintain the fluid leakage inside the shocks. Inspect them with the naked eye and replace the worn-out mounts.

Repair the holes, dents, and scratches of the housing. Change the broken leaf springs with new and high-quality gadgets.

Manufacturing material for the frame

The manufacturing companies make the frames with high-quality aluminum and steel material. The combination of metals protects the external surface from UV rays, rain, and moisture.

They can last longer than many other automobiles due to their unique designs and attractive layouts.

Load tolerance 

They are weight hauling variants that can transport heavy objects, hazardous material, and freight.

Their bodies can survive with the life of a tractor and trailer. However, the trailer has a multi-layered steel body to tow and tolerate the heavy loads. 

Which factors affect the lifespan of semi-trucks?

They are long-lasting trucks with an attached trailer and appealing design. However, the following factors affect and reduce their lifespan. 

Tendency of maintenance 

They can transport weight and require service, cleaning, and maintenance according to their usage. 

The engines of these variants are complex and require frequent oil changes to fight against heavy loads.

The camshafts and pistons undergo massive damage due to constant use. However, regular maintenance and repair can prolong their shelf life.

Negligence can reduce their durability, and you can lose these variants. A professional mechanic can check and resolve the internal faults within 2 to 3 days. 

Quality of fuel and lubricants

These variants transport around 62% to 63% of goods across the USA. Their rotational components require lubricating oil to reduce friction.

You cannot use gasoline in diesel engines. It reduces their efficiency and work performance, and engine failure happens at around 10000 to 20000 miles.

Lack of lubrication results in damage to the internal parts. The friction causes wearing and other faults which cause expensive repairing. 

Excessive cargo weight

The legally allowed weight for these variants is about 81000 pounds to 82000 pounds. However, it varies according to the state rules and hauling policies.

Its single-axle trailer can pull a weight of about 21000 pounds to 22000 pounds. However, the dual axle trailers can haul about 35000 to 36000 pounds.

It can carry the freight and other hauling material within the allowed limit.

However, stuffing of extra load affects the brakes, transmission, engine, battery, and wheels of these variants and shortens their life. 

Dimensions of trailers

A trailer of around 49 to 54 feet can attach with a semi-truck. It has an average width of about 9 feet to 9.3 feet. 

The authorities allow a legal height of about 14.2 to 14.4 feet. You cannot violate these dimensions because the massive trailer can affect the front part. 

Braking interval

These variants carry heavy material on the trailer and pull them at a particular speed. The constant stationary and starting movements affect the brake pads.

It causes fatal accidental conditions, and the driver can lose the vehicle. Instead, adjust the braking interval and stabilize the load over the cargo. 

Lack of driving skills

Insufficient driving skills cause problems in busy and off-road conditions. The driver cannot handle the trailer due to a lack of handling skills.

As a result, the rear section sways, and the tractor part idles. Loss of control damages the truck and the loaded material and causes life-threatening events.

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